./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 06:15:47,209 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:15:47,212 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:15:47,239 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:15:47,239 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:15:47,240 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:15:47,241 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:15:47,243 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:15:47,244 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:15:47,245 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:15:47,246 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:15:47,247 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:15:47,247 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:15:47,248 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:15:47,249 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:15:47,250 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:15:47,250 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:15:47,251 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:15:47,253 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:15:47,254 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:15:47,269 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:15:47,272 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:15:47,273 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:15:47,274 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:15:47,276 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:15:47,280 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:15:47,280 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:15:47,281 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:15:47,281 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:15:47,282 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:15:47,283 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:15:47,283 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:15:47,284 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:15:47,287 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:15:47,287 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:15:47,288 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:15:47,288 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:15:47,288 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:15:47,289 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:15:47,290 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:15:47,290 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:15:47,292 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-08-30 06:15:47,310 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:15:47,311 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:15:47,311 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:15:47,311 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:15:47,312 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:15:47,312 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:15:47,312 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:15:47,312 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:15:47,313 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:15:47,313 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:15:47,314 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:15:47,314 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:15:47,314 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:15:47,314 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:15:47,315 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:15:47,315 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:15:47,315 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:15:47,315 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:15:47,315 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:15:47,315 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:15:47,315 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:15:47,316 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:15:47,316 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:15:47,316 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:15:47,316 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:15:47,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:15:47,317 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:15:47,317 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:15:47,317 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 06:15:47,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 06:15:47,317 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:15:47,317 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:15:47,317 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:15:47,318 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:15:47,318 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:15:47,608 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:15:47,628 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:15:47,630 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:15:47,631 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:15:47,632 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:15:47,633 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c [2023-08-30 06:15:48,724 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:15:48,906 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:15:48,906 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c [2023-08-30 06:15:48,911 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08c52611a/562efa111dba41668197829ace6c7c29/FLAG99ace99a5 [2023-08-30 06:15:49,277 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08c52611a/562efa111dba41668197829ace6c7c29 [2023-08-30 06:15:49,279 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:15:49,280 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:15:49,281 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:15:49,281 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:15:49,283 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:15:49,283 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:15:49" (1/1) ... [2023-08-30 06:15:49,288 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cbc3aff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:49, skipping insertion in model container [2023-08-30 06:15:49,288 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:15:49" (1/1) ... [2023-08-30 06:15:49,292 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:15:49,303 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:15:49,427 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c[2947,2960] [2023-08-30 06:15:49,438 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:15:49,448 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-08-30 06:15:49,449 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@50d16bed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:49, skipping insertion in model container [2023-08-30 06:15:49,450 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:15:49,450 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-08-30 06:15:49,452 INFO L158 Benchmark]: Toolchain (without parser) took 171.25ms. Allocated memory is still 67.1MB. Free memory was 45.6MB in the beginning and 35.9MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 06:15:49,452 INFO L158 Benchmark]: CDTParser took 0.43ms. Allocated memory is still 67.1MB. Free memory is still 45.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 06:15:49,453 INFO L158 Benchmark]: CACSL2BoogieTranslator took 169.26ms. Allocated memory is still 67.1MB. Free memory was 45.5MB in the beginning and 36.0MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 06:15:49,454 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.43ms. Allocated memory is still 67.1MB. Free memory is still 45.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 169.26ms. Allocated memory is still 67.1MB. Free memory was 45.5MB in the beginning and 36.0MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 114]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 06:15:51,034 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 06:15:51,036 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 06:15:51,071 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 06:15:51,073 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 06:15:51,075 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 06:15:51,077 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 06:15:51,079 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 06:15:51,081 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 06:15:51,085 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 06:15:51,086 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 06:15:51,088 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 06:15:51,088 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 06:15:51,090 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 06:15:51,091 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 06:15:51,092 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 06:15:51,092 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 06:15:51,093 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 06:15:51,097 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 06:15:51,102 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 06:15:51,113 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 06:15:51,114 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 06:15:51,114 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 06:15:51,115 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 06:15:51,121 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 06:15:51,121 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 06:15:51,121 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 06:15:51,123 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 06:15:51,123 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 06:15:51,124 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 06:15:51,124 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 06:15:51,130 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 06:15:51,131 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 06:15:51,132 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 06:15:51,133 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 06:15:51,133 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 06:15:51,135 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 06:15:51,135 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 06:15:51,135 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 06:15:51,136 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 06:15:51,136 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 06:15:51,138 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-08-30 06:15:51,166 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 06:15:51,166 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 06:15:51,167 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 06:15:51,167 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 06:15:51,168 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 06:15:51,168 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 06:15:51,169 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 06:15:51,169 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 06:15:51,169 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 06:15:51,169 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 06:15:51,170 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 06:15:51,170 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-08-30 06:15:51,170 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 06:15:51,170 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 06:15:51,170 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 06:15:51,170 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-08-30 06:15:51,171 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-08-30 06:15:51,171 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-08-30 06:15:51,171 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 06:15:51,171 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-08-30 06:15:51,171 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2023-08-30 06:15:51,171 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-08-30 06:15:51,171 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 06:15:51,172 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 06:15:51,172 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 06:15:51,172 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 06:15:51,172 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 06:15:51,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:15:51,172 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 06:15:51,173 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 06:15:51,173 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2023-08-30 06:15:51,173 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-08-30 06:15:51,173 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 06:15:51,173 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 06:15:51,174 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 06:15:51,174 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2023-08-30 06:15:51,174 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 06:15:51,174 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c902137dd689344b33e1214981c74c26e47854ade5db7e5e71980f90fd07d90c Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 06:15:51,422 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 06:15:51,441 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 06:15:51,443 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 06:15:51,444 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 06:15:51,444 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 06:15:51,445 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c [2023-08-30 06:15:52,549 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 06:15:52,713 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 06:15:52,713 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c [2023-08-30 06:15:52,717 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/856689840/778232affd754169b14750fecffe14a3/FLAGc4c78761b [2023-08-30 06:15:52,727 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/856689840/778232affd754169b14750fecffe14a3 [2023-08-30 06:15:52,729 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 06:15:52,730 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 06:15:52,746 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 06:15:52,746 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 06:15:52,748 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 06:15:52,748 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:15:52" (1/1) ... [2023-08-30 06:15:52,749 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78326192 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:52, skipping insertion in model container [2023-08-30 06:15:52,750 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 06:15:52" (1/1) ... [2023-08-30 06:15:52,754 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 06:15:52,769 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:15:52,906 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c[2947,2960] [2023-08-30 06:15:52,918 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:15:52,930 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-08-30 06:15:52,937 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 06:15:52,945 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c[2947,2960] [2023-08-30 06:15:52,952 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:15:52,959 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 06:15:52,975 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c[2947,2960] [2023-08-30 06:15:52,978 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 06:15:52,990 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:15:52,990 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 06:15:52,995 INFO L208 MainTranslator]: Completed translation [2023-08-30 06:15:52,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:52 WrapperNode [2023-08-30 06:15:52,996 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 06:15:52,997 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 06:15:52,997 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 06:15:52,997 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 06:15:53,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:52" (1/1) ... [2023-08-30 06:15:53,010 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:52" (1/1) ... [2023-08-30 06:15:53,028 INFO L138 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 152 [2023-08-30 06:15:53,029 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 06:15:53,030 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 06:15:53,030 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 06:15:53,030 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 06:15:53,036 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:52" (1/1) ... [2023-08-30 06:15:53,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:52" (1/1) ... [2023-08-30 06:15:53,042 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:52" (1/1) ... [2023-08-30 06:15:53,043 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:52" (1/1) ... [2023-08-30 06:15:53,049 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:52" (1/1) ... [2023-08-30 06:15:53,061 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:52" (1/1) ... [2023-08-30 06:15:53,062 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:52" (1/1) ... [2023-08-30 06:15:53,063 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:52" (1/1) ... [2023-08-30 06:15:53,069 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 06:15:53,070 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 06:15:53,070 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 06:15:53,070 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 06:15:53,071 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:52" (1/1) ... [2023-08-30 06:15:53,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 06:15:53,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 06:15:53,109 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 06:15:53,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 06:15:53,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 06:15:53,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-08-30 06:15:53,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 06:15:53,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-08-30 06:15:53,146 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 06:15:53,146 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 06:15:53,146 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 06:15:53,146 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 06:15:53,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 06:15:53,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 06:15:53,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 06:15:53,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 06:15:53,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 06:15:53,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 06:15:53,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-08-30 06:15:53,148 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 06:15:53,229 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 06:15:53,231 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 06:15:53,577 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 06:15:53,644 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 06:15:53,644 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-30 06:15:53,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:15:53 BoogieIcfgContainer [2023-08-30 06:15:53,646 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 06:15:53,648 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 06:15:53,648 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 06:15:53,650 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 06:15:53,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 06:15:52" (1/3) ... [2023-08-30 06:15:53,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58a9ebc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:15:53, skipping insertion in model container [2023-08-30 06:15:53,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 06:15:52" (2/3) ... [2023-08-30 06:15:53,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58a9ebc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 06:15:53, skipping insertion in model container [2023-08-30 06:15:53,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 06:15:53" (3/3) ... [2023-08-30 06:15:53,652 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2023-08-30 06:15:53,664 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 06:15:53,665 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-08-30 06:15:53,665 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 06:15:53,726 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 06:15:53,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 152 transitions, 320 flow [2023-08-30 06:15:53,821 INFO L130 PetriNetUnfolder]: 11/150 cut-off events. [2023-08-30 06:15:53,821 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 06:15:53,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 150 events. 11/150 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 209 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 99. Up to 2 conditions per place. [2023-08-30 06:15:53,826 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 152 transitions, 320 flow [2023-08-30 06:15:53,830 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 146 transitions, 304 flow [2023-08-30 06:15:53,833 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 06:15:53,840 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 142 places, 146 transitions, 304 flow [2023-08-30 06:15:53,842 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 142 places, 146 transitions, 304 flow [2023-08-30 06:15:53,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 146 transitions, 304 flow [2023-08-30 06:15:53,869 INFO L130 PetriNetUnfolder]: 11/146 cut-off events. [2023-08-30 06:15:53,869 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 06:15:53,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 146 events. 11/146 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 209 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 99. Up to 2 conditions per place. [2023-08-30 06:15:53,871 INFO L119 LiptonReduction]: Number of co-enabled transitions 1984 [2023-08-30 06:16:05,615 INFO L134 LiptonReduction]: Checked pairs total: 2411 [2023-08-30 06:16:05,616 INFO L136 LiptonReduction]: Total number of compositions: 161 [2023-08-30 06:16:05,625 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 06:16:05,629 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3e305e1f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 06:16:05,629 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2023-08-30 06:16:05,631 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2023-08-30 06:16:05,631 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 06:16:05,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:16:05,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:16:05,632 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 06:16:05,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:16:05,635 INFO L85 PathProgramCache]: Analyzing trace with hash 20705, now seen corresponding path program 1 times [2023-08-30 06:16:05,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:16:05,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1033798340] [2023-08-30 06:16:05,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:16:05,643 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:16:05,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:16:05,666 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:16:05,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-08-30 06:16:05,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:16:05,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:16:05,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:16:05,823 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 06:16:05,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 06:16:05,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:16:05,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:16:05,863 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:16:05,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1033798340] [2023-08-30 06:16:05,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1033798340] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:16:05,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:16:05,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:16:05,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843234425] [2023-08-30 06:16:05,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:16:05,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:16:05,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:16:05,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:16:05,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:16:06,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 313 [2023-08-30 06:16:06,019 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:06,019 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:16:06,019 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 313 [2023-08-30 06:16:06,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:16:06,323 INFO L130 PetriNetUnfolder]: 1065/1520 cut-off events. [2023-08-30 06:16:06,324 INFO L131 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2023-08-30 06:16:06,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3076 conditions, 1520 events. 1065/1520 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 7469 event pairs, 528 based on Foata normal form. 0/417 useless extension candidates. Maximal degree in co-relation 1356. Up to 756 conditions per place. [2023-08-30 06:16:06,336 INFO L137 encePairwiseOnDemand]: 309/313 looper letters, 60 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-08-30 06:16:06,336 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 64 transitions, 276 flow [2023-08-30 06:16:06,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:16:06,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:16:06,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 452 transitions. [2023-08-30 06:16:06,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48136315228966986 [2023-08-30 06:16:06,354 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 452 transitions. [2023-08-30 06:16:06,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 452 transitions. [2023-08-30 06:16:06,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:16:06,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 452 transitions. [2023-08-30 06:16:06,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:06,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:06,371 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:06,373 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 82 flow. Second operand 3 states and 452 transitions. [2023-08-30 06:16:06,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 64 transitions, 276 flow [2023-08-30 06:16:06,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 64 transitions, 260 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 06:16:06,379 INFO L231 Difference]: Finished difference. Result has 37 places, 35 transitions, 84 flow [2023-08-30 06:16:06,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=37, PETRI_TRANSITIONS=35} [2023-08-30 06:16:06,385 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -2 predicate places. [2023-08-30 06:16:06,385 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 35 transitions, 84 flow [2023-08-30 06:16:06,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:06,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:16:06,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:16:06,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-08-30 06:16:06,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:16:06,596 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 06:16:06,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:16:06,597 INFO L85 PathProgramCache]: Analyzing trace with hash 20787, now seen corresponding path program 1 times [2023-08-30 06:16:06,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:16:06,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1249286810] [2023-08-30 06:16:06,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:16:06,601 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:16:06,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:16:06,603 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:16:06,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-08-30 06:16:06,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:16:06,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-30 06:16:06,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:16:06,692 INFO L321 Elim1Store]: treesize reduction 46, result has 29.2 percent of original size [2023-08-30 06:16:06,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 33 [2023-08-30 06:16:06,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:16:06,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:16:06,742 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:16:06,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1249286810] [2023-08-30 06:16:06,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1249286810] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:16:06,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:16:06,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:16:06,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59510013] [2023-08-30 06:16:06,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:16:06,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:16:06,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:16:06,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:16:06,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:16:06,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 313 [2023-08-30 06:16:06,816 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:06,816 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:16:06,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 313 [2023-08-30 06:16:06,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:16:06,992 INFO L130 PetriNetUnfolder]: 805/1174 cut-off events. [2023-08-30 06:16:06,992 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 06:16:06,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2359 conditions, 1174 events. 805/1174 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 5694 event pairs, 396 based on Foata normal form. 0/347 useless extension candidates. Maximal degree in co-relation 1177. Up to 1162 conditions per place. [2023-08-30 06:16:06,996 INFO L137 encePairwiseOnDemand]: 310/313 looper letters, 30 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-08-30 06:16:06,996 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 33 transitions, 142 flow [2023-08-30 06:16:06,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:16:06,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:16:06,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 410 transitions. [2023-08-30 06:16:06,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4366347177848775 [2023-08-30 06:16:06,998 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 410 transitions. [2023-08-30 06:16:06,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 410 transitions. [2023-08-30 06:16:06,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:16:06,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 410 transitions. [2023-08-30 06:16:06,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:07,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:07,001 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:07,001 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 84 flow. Second operand 3 states and 410 transitions. [2023-08-30 06:16:07,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 33 transitions, 142 flow [2023-08-30 06:16:07,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 33 transitions, 140 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:16:07,002 INFO L231 Difference]: Finished difference. Result has 36 places, 33 transitions, 80 flow [2023-08-30 06:16:07,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=36, PETRI_TRANSITIONS=33} [2023-08-30 06:16:07,003 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -3 predicate places. [2023-08-30 06:16:07,003 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 33 transitions, 80 flow [2023-08-30 06:16:07,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:07,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:16:07,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:16:07,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-08-30 06:16:07,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:16:07,211 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 06:16:07,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:16:07,212 INFO L85 PathProgramCache]: Analyzing trace with hash 20786, now seen corresponding path program 1 times [2023-08-30 06:16:07,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:16:07,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [547899347] [2023-08-30 06:16:07,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:16:07,212 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:16:07,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:16:07,217 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:16:07,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-08-30 06:16:07,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:16:07,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:16:07,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:16:07,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:16:07,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:16:07,317 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 06:16:07,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-30 06:16:07,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-30 06:16:07,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:16:07,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:16:07,365 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:16:07,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [547899347] [2023-08-30 06:16:07,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [547899347] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:16:07,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:16:07,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:16:07,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547303577] [2023-08-30 06:16:07,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:16:07,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:16:07,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:16:07,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:16:07,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:16:07,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 313 [2023-08-30 06:16:07,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 33 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:07,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:16:07,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 313 [2023-08-30 06:16:07,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:16:07,643 INFO L130 PetriNetUnfolder]: 545/828 cut-off events. [2023-08-30 06:16:07,643 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 06:16:07,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1667 conditions, 828 events. 545/828 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 3929 event pairs, 264 based on Foata normal form. 0/291 useless extension candidates. Maximal degree in co-relation 1659. Up to 816 conditions per place. [2023-08-30 06:16:07,646 INFO L137 encePairwiseOnDemand]: 310/313 looper letters, 28 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-08-30 06:16:07,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 31 transitions, 134 flow [2023-08-30 06:16:07,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:16:07,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:16:07,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 417 transitions. [2023-08-30 06:16:07,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4440894568690096 [2023-08-30 06:16:07,648 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 417 transitions. [2023-08-30 06:16:07,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 417 transitions. [2023-08-30 06:16:07,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:16:07,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 417 transitions. [2023-08-30 06:16:07,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:07,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:07,651 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:07,651 INFO L175 Difference]: Start difference. First operand has 36 places, 33 transitions, 80 flow. Second operand 3 states and 417 transitions. [2023-08-30 06:16:07,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 31 transitions, 134 flow [2023-08-30 06:16:07,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 31 transitions, 133 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:16:07,652 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 77 flow [2023-08-30 06:16:07,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-08-30 06:16:07,652 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -4 predicate places. [2023-08-30 06:16:07,652 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 77 flow [2023-08-30 06:16:07,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:07,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:16:07,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-30 06:16:07,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-08-30 06:16:07,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:16:07,861 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 06:16:07,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:16:07,862 INFO L85 PathProgramCache]: Analyzing trace with hash 20703, now seen corresponding path program 1 times [2023-08-30 06:16:07,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:16:07,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [844871864] [2023-08-30 06:16:07,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:16:07,862 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:16:07,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:16:07,864 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:16:07,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-08-30 06:16:07,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:16:07,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 06:16:07,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:16:07,946 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 06:16:07,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 06:16:07,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:16:07,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:16:07,956 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:16:07,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [844871864] [2023-08-30 06:16:07,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [844871864] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:16:07,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:16:07,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:16:07,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655329148] [2023-08-30 06:16:07,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:16:07,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:16:07,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:16:07,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:16:07,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:16:08,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 313 [2023-08-30 06:16:08,018 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:08,018 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:16:08,018 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 313 [2023-08-30 06:16:08,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:16:08,134 INFO L130 PetriNetUnfolder]: 545/826 cut-off events. [2023-08-30 06:16:08,135 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 06:16:08,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1664 conditions, 826 events. 545/826 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 3942 event pairs, 264 based on Foata normal form. 0/291 useless extension candidates. Maximal degree in co-relation 1655. Up to 814 conditions per place. [2023-08-30 06:16:08,138 INFO L137 encePairwiseOnDemand]: 311/313 looper letters, 27 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-30 06:16:08,138 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 30 transitions, 131 flow [2023-08-30 06:16:08,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:16:08,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:16:08,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 415 transitions. [2023-08-30 06:16:08,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44195953141640043 [2023-08-30 06:16:08,139 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 415 transitions. [2023-08-30 06:16:08,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 415 transitions. [2023-08-30 06:16:08,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:16:08,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 415 transitions. [2023-08-30 06:16:08,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:08,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:08,142 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:08,142 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 77 flow. Second operand 3 states and 415 transitions. [2023-08-30 06:16:08,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 30 transitions, 131 flow [2023-08-30 06:16:08,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 30 transitions, 130 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:16:08,143 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 76 flow [2023-08-30 06:16:08,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-08-30 06:16:08,144 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -4 predicate places. [2023-08-30 06:16:08,144 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 76 flow [2023-08-30 06:16:08,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:08,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:16:08,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-30 06:16:08,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-08-30 06:16:08,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:16:08,351 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 06:16:08,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:16:08,352 INFO L85 PathProgramCache]: Analyzing trace with hash 644704, now seen corresponding path program 1 times [2023-08-30 06:16:08,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:16:08,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [793038492] [2023-08-30 06:16:08,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:16:08,352 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:16:08,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:16:08,355 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:16:08,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-08-30 06:16:08,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:16:08,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-30 06:16:08,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:16:08,442 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 06:16:08,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 06:16:08,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:16:08,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:16:08,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:16:08,631 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:16:08,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [793038492] [2023-08-30 06:16:08,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [793038492] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:16:08,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:16:08,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 4 [2023-08-30 06:16:08,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346294258] [2023-08-30 06:16:08,632 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:16:08,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-30 06:16:08,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:16:08,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-30 06:16:08,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-30 06:16:09,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 313 [2023-08-30 06:16:09,079 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 76 flow. Second operand has 6 states, 6 states have (on average 125.0) internal successors, (750), 6 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:09,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:16:09,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 313 [2023-08-30 06:16:09,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:16:09,524 INFO L130 PetriNetUnfolder]: 819/1242 cut-off events. [2023-08-30 06:16:09,524 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 06:16:09,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2501 conditions, 1242 events. 819/1242 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 6365 event pairs, 396 based on Foata normal form. 0/452 useless extension candidates. Maximal degree in co-relation 2491. Up to 408 conditions per place. [2023-08-30 06:16:09,529 INFO L137 encePairwiseOnDemand]: 309/313 looper letters, 74 selfloop transitions, 7 changer transitions 0/83 dead transitions. [2023-08-30 06:16:09,529 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 83 transitions, 358 flow [2023-08-30 06:16:09,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 06:16:09,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 06:16:09,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 828 transitions. [2023-08-30 06:16:09,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44089456869009586 [2023-08-30 06:16:09,532 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 828 transitions. [2023-08-30 06:16:09,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 828 transitions. [2023-08-30 06:16:09,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:16:09,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 828 transitions. [2023-08-30 06:16:09,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 138.0) internal successors, (828), 6 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:09,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 313.0) internal successors, (2191), 7 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:09,546 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 313.0) internal successors, (2191), 7 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:09,546 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 76 flow. Second operand 6 states and 828 transitions. [2023-08-30 06:16:09,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 83 transitions, 358 flow [2023-08-30 06:16:09,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 83 transitions, 357 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:16:09,549 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 129 flow [2023-08-30 06:16:09,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=129, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2023-08-30 06:16:09,551 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 4 predicate places. [2023-08-30 06:16:09,552 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 129 flow [2023-08-30 06:16:09,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 125.0) internal successors, (750), 6 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:09,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:16:09,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 06:16:09,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-08-30 06:16:09,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:16:09,760 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 06:16:09,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:16:09,761 INFO L85 PathProgramCache]: Analyzing trace with hash 19992011, now seen corresponding path program 1 times [2023-08-30 06:16:09,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:16:09,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [841044991] [2023-08-30 06:16:09,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:16:09,761 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:16:09,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:16:09,763 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:16:09,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-08-30 06:16:09,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:16:09,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:16:09,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:16:09,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:16:09,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 06:16:09,845 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-30 06:16:09,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-08-30 06:16:09,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-08-30 06:16:09,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:16:09,867 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:16:09,868 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:16:09,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [841044991] [2023-08-30 06:16:09,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [841044991] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:16:09,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:16:09,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:16:09,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519375158] [2023-08-30 06:16:09,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:16:09,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:16:09,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:16:09,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:16:09,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:16:09,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 313 [2023-08-30 06:16:09,962 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:09,962 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:16:09,962 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 313 [2023-08-30 06:16:09,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:16:10,117 INFO L130 PetriNetUnfolder]: 759/1143 cut-off events. [2023-08-30 06:16:10,118 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-08-30 06:16:10,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2329 conditions, 1143 events. 759/1143 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 5791 event pairs, 366 based on Foata normal form. 0/426 useless extension candidates. Maximal degree in co-relation 2314. Up to 1125 conditions per place. [2023-08-30 06:16:10,122 INFO L137 encePairwiseOnDemand]: 310/313 looper letters, 30 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-08-30 06:16:10,122 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 33 transitions, 187 flow [2023-08-30 06:16:10,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:16:10,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:16:10,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 414 transitions. [2023-08-30 06:16:10,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44089456869009586 [2023-08-30 06:16:10,124 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 414 transitions. [2023-08-30 06:16:10,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 414 transitions. [2023-08-30 06:16:10,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:16:10,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 414 transitions. [2023-08-30 06:16:10,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:10,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:10,127 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:10,127 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 129 flow. Second operand 3 states and 414 transitions. [2023-08-30 06:16:10,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 33 transitions, 187 flow [2023-08-30 06:16:10,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 33 transitions, 177 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 06:16:10,131 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 117 flow [2023-08-30 06:16:10,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2023-08-30 06:16:10,133 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2023-08-30 06:16:10,133 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 117 flow [2023-08-30 06:16:10,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:10,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:16:10,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-30 06:16:10,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-08-30 06:16:10,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:16:10,340 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 06:16:10,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:16:10,341 INFO L85 PathProgramCache]: Analyzing trace with hash 19992010, now seen corresponding path program 1 times [2023-08-30 06:16:10,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:16:10,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [209768063] [2023-08-30 06:16:10,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:16:10,343 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:16:10,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:16:10,347 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:16:10,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-08-30 06:16:10,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:16:10,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 06:16:10,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:16:10,425 INFO L321 Elim1Store]: treesize reduction 43, result has 33.8 percent of original size [2023-08-30 06:16:10,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 29 [2023-08-30 06:16:10,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:16:10,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:16:10,443 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:16:10,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [209768063] [2023-08-30 06:16:10,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [209768063] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:16:10,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:16:10,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:16:10,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419031050] [2023-08-30 06:16:10,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:16:10,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:16:10,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:16:10,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:16:10,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:16:10,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 313 [2023-08-30 06:16:10,499 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 117 flow. Second operand has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:10,499 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:16:10,499 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 313 [2023-08-30 06:16:10,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:16:10,624 INFO L130 PetriNetUnfolder]: 699/1044 cut-off events. [2023-08-30 06:16:10,624 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-30 06:16:10,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2128 conditions, 1044 events. 699/1044 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 5145 event pairs, 336 based on Foata normal form. 0/411 useless extension candidates. Maximal degree in co-relation 2112. Up to 1026 conditions per place. [2023-08-30 06:16:10,627 INFO L137 encePairwiseOnDemand]: 310/313 looper letters, 28 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-08-30 06:16:10,627 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 31 transitions, 171 flow [2023-08-30 06:16:10,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:16:10,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:16:10,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 403 transitions. [2023-08-30 06:16:10,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4291799787007455 [2023-08-30 06:16:10,629 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 403 transitions. [2023-08-30 06:16:10,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 403 transitions. [2023-08-30 06:16:10,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:16:10,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 403 transitions. [2023-08-30 06:16:10,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:10,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:10,632 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:10,632 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 117 flow. Second operand 3 states and 403 transitions. [2023-08-30 06:16:10,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 31 transitions, 171 flow [2023-08-30 06:16:10,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 31 transitions, 170 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:16:10,634 INFO L231 Difference]: Finished difference. Result has 41 places, 31 transitions, 114 flow [2023-08-30 06:16:10,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=41, PETRI_TRANSITIONS=31} [2023-08-30 06:16:10,635 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 2 predicate places. [2023-08-30 06:16:10,635 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 31 transitions, 114 flow [2023-08-30 06:16:10,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:10,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:16:10,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:16:10,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-08-30 06:16:10,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:16:10,843 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 06:16:10,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:16:10,843 INFO L85 PathProgramCache]: Analyzing trace with hash 619747812, now seen corresponding path program 1 times [2023-08-30 06:16:10,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:16:10,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1030093177] [2023-08-30 06:16:10,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:16:10,844 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:16:10,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:16:10,844 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:16:10,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-08-30 06:16:10,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:16:10,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-30 06:16:10,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:16:10,936 INFO L321 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2023-08-30 06:16:10,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 33 [2023-08-30 06:16:10,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:16:10,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:16:10,953 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:16:10,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1030093177] [2023-08-30 06:16:10,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1030093177] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:16:10,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:16:10,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:16:10,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656541203] [2023-08-30 06:16:10,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:16:10,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:16:10,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:16:10,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:16:10,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:16:11,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 313 [2023-08-30 06:16:11,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:11,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:16:11,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 313 [2023-08-30 06:16:11,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:16:11,144 INFO L130 PetriNetUnfolder]: 402/627 cut-off events. [2023-08-30 06:16:11,145 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-08-30 06:16:11,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1295 conditions, 627 events. 402/627 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 2863 event pairs, 189 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 1278. Up to 605 conditions per place. [2023-08-30 06:16:11,151 INFO L137 encePairwiseOnDemand]: 308/313 looper letters, 22 selfloop transitions, 4 changer transitions 0/28 dead transitions. [2023-08-30 06:16:11,151 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 28 transitions, 160 flow [2023-08-30 06:16:11,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:16:11,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:16:11,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 515 transitions. [2023-08-30 06:16:11,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41134185303514376 [2023-08-30 06:16:11,153 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 515 transitions. [2023-08-30 06:16:11,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 515 transitions. [2023-08-30 06:16:11,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:16:11,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 515 transitions. [2023-08-30 06:16:11,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 128.75) internal successors, (515), 4 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:11,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 313.0) internal successors, (1565), 5 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:11,157 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 313.0) internal successors, (1565), 5 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:11,157 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 114 flow. Second operand 4 states and 515 transitions. [2023-08-30 06:16:11,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 28 transitions, 160 flow [2023-08-30 06:16:11,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 28 transitions, 159 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 06:16:11,159 INFO L231 Difference]: Finished difference. Result has 40 places, 28 transitions, 115 flow [2023-08-30 06:16:11,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=115, PETRI_PLACES=40, PETRI_TRANSITIONS=28} [2023-08-30 06:16:11,161 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 1 predicate places. [2023-08-30 06:16:11,161 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 28 transitions, 115 flow [2023-08-30 06:16:11,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:11,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:16:11,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-30 06:16:11,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-08-30 06:16:11,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:16:11,369 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 06:16:11,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:16:11,369 INFO L85 PathProgramCache]: Analyzing trace with hash 619747813, now seen corresponding path program 1 times [2023-08-30 06:16:11,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:16:11,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [128788162] [2023-08-30 06:16:11,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:16:11,370 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:16:11,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:16:11,374 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:16:11,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-08-30 06:16:11,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:16:11,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-30 06:16:11,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:16:11,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:16:11,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:16:11,469 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:16:11,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [128788162] [2023-08-30 06:16:11,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [128788162] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:16:11,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:16:11,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:16:11,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808887226] [2023-08-30 06:16:11,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:16:11,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:16:11,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:16:11,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:16:11,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:16:11,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 313 [2023-08-30 06:16:11,503 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 28 transitions, 115 flow. Second operand has 4 states, 4 states have (on average 127.25) internal successors, (509), 4 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:11,504 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:16:11,504 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 313 [2023-08-30 06:16:11,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:16:11,679 INFO L130 PetriNetUnfolder]: 366/672 cut-off events. [2023-08-30 06:16:11,679 INFO L131 PetriNetUnfolder]: For 28/28 co-relation queries the response was YES. [2023-08-30 06:16:11,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1397 conditions, 672 events. 366/672 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 3504 event pairs, 63 based on Foata normal form. 0/423 useless extension candidates. Maximal degree in co-relation 1379. Up to 247 conditions per place. [2023-08-30 06:16:11,682 INFO L137 encePairwiseOnDemand]: 307/313 looper letters, 46 selfloop transitions, 5 changer transitions 0/52 dead transitions. [2023-08-30 06:16:11,682 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 52 transitions, 268 flow [2023-08-30 06:16:11,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 06:16:11,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 06:16:11,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 679 transitions. [2023-08-30 06:16:11,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4338658146964856 [2023-08-30 06:16:11,683 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 679 transitions. [2023-08-30 06:16:11,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 679 transitions. [2023-08-30 06:16:11,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:16:11,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 679 transitions. [2023-08-30 06:16:11,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 135.8) internal successors, (679), 5 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:11,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 313.0) internal successors, (1878), 6 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:11,687 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 313.0) internal successors, (1878), 6 states have internal predecessors, (1878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:11,687 INFO L175 Difference]: Start difference. First operand has 40 places, 28 transitions, 115 flow. Second operand 5 states and 679 transitions. [2023-08-30 06:16:11,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 52 transitions, 268 flow [2023-08-30 06:16:11,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 52 transitions, 263 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:16:11,688 INFO L231 Difference]: Finished difference. Result has 46 places, 32 transitions, 154 flow [2023-08-30 06:16:11,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=154, PETRI_PLACES=46, PETRI_TRANSITIONS=32} [2023-08-30 06:16:11,689 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 7 predicate places. [2023-08-30 06:16:11,689 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 32 transitions, 154 flow [2023-08-30 06:16:11,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.25) internal successors, (509), 4 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:11,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:16:11,689 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-30 06:16:11,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-08-30 06:16:11,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:16:11,896 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 06:16:11,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:16:11,896 INFO L85 PathProgramCache]: Analyzing trace with hash 2029336737, now seen corresponding path program 2 times [2023-08-30 06:16:11,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:16:11,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2098566218] [2023-08-30 06:16:11,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:16:11,896 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:16:11,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:16:11,897 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:16:11,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-08-30 06:16:11,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:16:11,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:16:11,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 06:16:11,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:16:12,015 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 06:16:12,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 06:16:12,122 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:16:12,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:16:12,511 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:16:12,511 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:16:12,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2098566218] [2023-08-30 06:16:12,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2098566218] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:16:12,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:16:12,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:16:12,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967027899] [2023-08-30 06:16:12,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:16:12,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:16:12,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:16:12,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:16:12,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:16:15,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 313 [2023-08-30 06:16:15,600 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 32 transitions, 154 flow. Second operand has 12 states, 12 states have (on average 126.0) internal successors, (1512), 12 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:15,600 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:16:15,600 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 313 [2023-08-30 06:16:15,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:16:18,220 INFO L130 PetriNetUnfolder]: 1202/2134 cut-off events. [2023-08-30 06:16:18,220 INFO L131 PetriNetUnfolder]: For 1749/1865 co-relation queries the response was YES. [2023-08-30 06:16:18,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5906 conditions, 2134 events. 1202/2134 cut-off events. For 1749/1865 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 13510 event pairs, 690 based on Foata normal form. 115/1686 useless extension candidates. Maximal degree in co-relation 5884. Up to 511 conditions per place. [2023-08-30 06:16:18,229 INFO L137 encePairwiseOnDemand]: 309/313 looper letters, 202 selfloop transitions, 12 changer transitions 0/217 dead transitions. [2023-08-30 06:16:18,229 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 217 transitions, 1286 flow [2023-08-30 06:16:18,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 06:16:18,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 06:16:18,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1690 transitions. [2023-08-30 06:16:18,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44994675186368477 [2023-08-30 06:16:18,258 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1690 transitions. [2023-08-30 06:16:18,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1690 transitions. [2023-08-30 06:16:18,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:16:18,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1690 transitions. [2023-08-30 06:16:18,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 140.83333333333334) internal successors, (1690), 12 states have internal predecessors, (1690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:18,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 313.0) internal successors, (4069), 13 states have internal predecessors, (4069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:18,268 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 313.0) internal successors, (4069), 13 states have internal predecessors, (4069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:18,268 INFO L175 Difference]: Start difference. First operand has 46 places, 32 transitions, 154 flow. Second operand 12 states and 1690 transitions. [2023-08-30 06:16:18,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 217 transitions, 1286 flow [2023-08-30 06:16:18,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 217 transitions, 1286 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 06:16:18,274 INFO L231 Difference]: Finished difference. Result has 64 places, 39 transitions, 253 flow [2023-08-30 06:16:18,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=253, PETRI_PLACES=64, PETRI_TRANSITIONS=39} [2023-08-30 06:16:18,274 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 25 predicate places. [2023-08-30 06:16:18,274 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 39 transitions, 253 flow [2023-08-30 06:16:18,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 126.0) internal successors, (1512), 12 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:18,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:16:18,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:16:18,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-08-30 06:16:18,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:16:18,483 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 06:16:18,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:16:18,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1418062756, now seen corresponding path program 1 times [2023-08-30 06:16:18,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:16:18,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1280310996] [2023-08-30 06:16:18,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:16:18,484 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:16:18,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:16:18,485 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:16:18,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-08-30 06:16:18,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:16:18,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 06:16:18,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:16:18,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:16:18,596 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:16:18,596 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:16:18,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1280310996] [2023-08-30 06:16:18,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1280310996] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:16:18,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:16:18,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:16:18,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782373503] [2023-08-30 06:16:18,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:16:18,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:16:18,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:16:18,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:16:18,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:16:18,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 313 [2023-08-30 06:16:18,657 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 39 transitions, 253 flow. Second operand has 4 states, 4 states have (on average 130.5) internal successors, (522), 4 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:18,657 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:16:18,657 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 313 [2023-08-30 06:16:18,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:16:18,947 INFO L130 PetriNetUnfolder]: 1091/1953 cut-off events. [2023-08-30 06:16:18,947 INFO L131 PetriNetUnfolder]: For 1635/1768 co-relation queries the response was YES. [2023-08-30 06:16:18,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5436 conditions, 1953 events. 1091/1953 cut-off events. For 1635/1768 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 12287 event pairs, 630 based on Foata normal form. 110/1503 useless extension candidates. Maximal degree in co-relation 5405. Up to 1886 conditions per place. [2023-08-30 06:16:18,958 INFO L137 encePairwiseOnDemand]: 307/313 looper letters, 44 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2023-08-30 06:16:18,958 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 50 transitions, 380 flow [2023-08-30 06:16:18,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:16:18,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:16:18,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 551 transitions. [2023-08-30 06:16:18,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44009584664536744 [2023-08-30 06:16:18,960 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 551 transitions. [2023-08-30 06:16:18,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 551 transitions. [2023-08-30 06:16:18,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:16:18,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 551 transitions. [2023-08-30 06:16:18,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 137.75) internal successors, (551), 4 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:18,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 313.0) internal successors, (1565), 5 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:18,963 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 313.0) internal successors, (1565), 5 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:18,963 INFO L175 Difference]: Start difference. First operand has 64 places, 39 transitions, 253 flow. Second operand 4 states and 551 transitions. [2023-08-30 06:16:18,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 50 transitions, 380 flow [2023-08-30 06:16:18,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 50 transitions, 355 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-30 06:16:18,967 INFO L231 Difference]: Finished difference. Result has 65 places, 40 transitions, 255 flow [2023-08-30 06:16:18,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=255, PETRI_PLACES=65, PETRI_TRANSITIONS=40} [2023-08-30 06:16:18,967 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 26 predicate places. [2023-08-30 06:16:18,968 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 40 transitions, 255 flow [2023-08-30 06:16:18,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 130.5) internal successors, (522), 4 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:18,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:16:18,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:16:18,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-08-30 06:16:19,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:16:19,176 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 06:16:19,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:16:19,176 INFO L85 PathProgramCache]: Analyzing trace with hash 374548029, now seen corresponding path program 1 times [2023-08-30 06:16:19,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:16:19,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1163358000] [2023-08-30 06:16:19,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:16:19,177 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:16:19,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:16:19,179 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:16:19,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-08-30 06:16:19,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:16:19,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 06:16:19,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:16:19,286 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 06:16:19,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 06:16:19,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:16:19,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:16:19,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:16:19,905 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:16:19,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1163358000] [2023-08-30 06:16:19,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1163358000] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:16:19,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:16:19,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2023-08-30 06:16:19,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235330406] [2023-08-30 06:16:19,905 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:16:19,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-30 06:16:19,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:16:19,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-30 06:16:19,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-08-30 06:16:23,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 313 [2023-08-30 06:16:23,990 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 40 transitions, 255 flow. Second operand has 8 states, 8 states have (on average 121.75) internal successors, (974), 8 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:23,990 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:16:23,990 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 313 [2023-08-30 06:16:23,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:16:27,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 06:16:27,977 INFO L130 PetriNetUnfolder]: 890/1620 cut-off events. [2023-08-30 06:16:27,977 INFO L131 PetriNetUnfolder]: For 1779/1876 co-relation queries the response was YES. [2023-08-30 06:16:27,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4839 conditions, 1620 events. 890/1620 cut-off events. For 1779/1876 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 9914 event pairs, 504 based on Foata normal form. 144/1537 useless extension candidates. Maximal degree in co-relation 4805. Up to 1249 conditions per place. [2023-08-30 06:16:27,997 INFO L137 encePairwiseOnDemand]: 306/313 looper letters, 68 selfloop transitions, 12 changer transitions 0/83 dead transitions. [2023-08-30 06:16:27,997 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 83 transitions, 574 flow [2023-08-30 06:16:27,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 06:16:27,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 06:16:28,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1270 transitions. [2023-08-30 06:16:28,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4057507987220447 [2023-08-30 06:16:28,002 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1270 transitions. [2023-08-30 06:16:28,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1270 transitions. [2023-08-30 06:16:28,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:16:28,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1270 transitions. [2023-08-30 06:16:28,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 127.0) internal successors, (1270), 10 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:28,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 313.0) internal successors, (3443), 11 states have internal predecessors, (3443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:28,008 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 313.0) internal successors, (3443), 11 states have internal predecessors, (3443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:28,008 INFO L175 Difference]: Start difference. First operand has 65 places, 40 transitions, 255 flow. Second operand 10 states and 1270 transitions. [2023-08-30 06:16:28,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 83 transitions, 574 flow [2023-08-30 06:16:28,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 83 transitions, 564 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-30 06:16:28,011 INFO L231 Difference]: Finished difference. Result has 74 places, 41 transitions, 293 flow [2023-08-30 06:16:28,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=293, PETRI_PLACES=74, PETRI_TRANSITIONS=41} [2023-08-30 06:16:28,012 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 35 predicate places. [2023-08-30 06:16:28,013 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 41 transitions, 293 flow [2023-08-30 06:16:28,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 121.75) internal successors, (974), 8 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:28,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:16:28,013 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:16:28,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-08-30 06:16:28,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:16:28,221 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 06:16:28,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:16:28,221 INFO L85 PathProgramCache]: Analyzing trace with hash 572523676, now seen corresponding path program 2 times [2023-08-30 06:16:28,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:16:28,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [405669007] [2023-08-30 06:16:28,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:16:28,222 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:16:28,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:16:28,223 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:16:28,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-08-30 06:16:28,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-30 06:16:28,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:16:28,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-30 06:16:28,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:16:28,342 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 06:16:28,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 06:16:28,441 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-30 06:16:28,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:16:28,441 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:16:28,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [405669007] [2023-08-30 06:16:28,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [405669007] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:16:28,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:16:28,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-30 06:16:28,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872312693] [2023-08-30 06:16:28,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:16:28,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 06:16:28,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:16:28,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 06:16:28,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 06:16:28,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 313 [2023-08-30 06:16:28,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 41 transitions, 293 flow. Second operand has 4 states, 4 states have (on average 127.75) internal successors, (511), 4 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:28,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:16:28,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 313 [2023-08-30 06:16:28,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:16:28,828 INFO L130 PetriNetUnfolder]: 488/954 cut-off events. [2023-08-30 06:16:28,828 INFO L131 PetriNetUnfolder]: For 2436/2550 co-relation queries the response was YES. [2023-08-30 06:16:28,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2849 conditions, 954 events. 488/954 cut-off events. For 2436/2550 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5351 event pairs, 252 based on Foata normal form. 215/1077 useless extension candidates. Maximal degree in co-relation 2813. Up to 902 conditions per place. [2023-08-30 06:16:28,832 INFO L137 encePairwiseOnDemand]: 308/313 looper letters, 28 selfloop transitions, 7 changer transitions 0/38 dead transitions. [2023-08-30 06:16:28,832 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 38 transitions, 337 flow [2023-08-30 06:16:28,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 06:16:28,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 06:16:28,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 524 transitions. [2023-08-30 06:16:28,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4185303514376997 [2023-08-30 06:16:28,834 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 524 transitions. [2023-08-30 06:16:28,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 524 transitions. [2023-08-30 06:16:28,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:16:28,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 524 transitions. [2023-08-30 06:16:28,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 131.0) internal successors, (524), 4 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:28,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 313.0) internal successors, (1565), 5 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:28,837 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 313.0) internal successors, (1565), 5 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:28,837 INFO L175 Difference]: Start difference. First operand has 74 places, 41 transitions, 293 flow. Second operand 4 states and 524 transitions. [2023-08-30 06:16:28,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 38 transitions, 337 flow [2023-08-30 06:16:28,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 38 transitions, 284 flow, removed 11 selfloop flow, removed 11 redundant places. [2023-08-30 06:16:28,841 INFO L231 Difference]: Finished difference. Result has 63 places, 38 transitions, 228 flow [2023-08-30 06:16:28,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=228, PETRI_PLACES=63, PETRI_TRANSITIONS=38} [2023-08-30 06:16:28,841 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 24 predicate places. [2023-08-30 06:16:28,842 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 38 transitions, 228 flow [2023-08-30 06:16:28,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.75) internal successors, (511), 4 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:28,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:16:28,842 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-30 06:16:28,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-08-30 06:16:29,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:16:29,050 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 06:16:29,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:16:29,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1856180289, now seen corresponding path program 3 times [2023-08-30 06:16:29,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:16:29,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1006088737] [2023-08-30 06:16:29,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:16:29,051 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:16:29,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:16:29,061 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:16:29,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-08-30 06:16:29,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-30 06:16:29,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:16:29,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-30 06:16:29,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:16:29,273 INFO L321 Elim1Store]: treesize reduction 37, result has 37.3 percent of original size [2023-08-30 06:16:29,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 14 treesize of output 29 [2023-08-30 06:16:29,632 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:16:29,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:16:31,910 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:16:31,910 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:16:31,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1006088737] [2023-08-30 06:16:31,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1006088737] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:16:31,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:16:31,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 22 [2023-08-30 06:16:31,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601993455] [2023-08-30 06:16:31,911 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:16:31,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 06:16:31,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:16:31,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 06:16:31,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2023-08-30 06:16:44,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 313 [2023-08-30 06:16:44,149 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 38 transitions, 228 flow. Second operand has 24 states, 24 states have (on average 126.0) internal successors, (3024), 24 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:44,149 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:16:44,149 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 313 [2023-08-30 06:16:44,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:16:59,477 INFO L130 PetriNetUnfolder]: 1124/2178 cut-off events. [2023-08-30 06:16:59,477 INFO L131 PetriNetUnfolder]: For 3203/3359 co-relation queries the response was YES. [2023-08-30 06:16:59,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6438 conditions, 2178 events. 1124/2178 cut-off events. For 3203/3359 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 12864 event pairs, 576 based on Foata normal form. 165/2310 useless extension candidates. Maximal degree in co-relation 6408. Up to 547 conditions per place. [2023-08-30 06:16:59,484 INFO L137 encePairwiseOnDemand]: 309/313 looper letters, 370 selfloop transitions, 24 changer transitions 0/397 dead transitions. [2023-08-30 06:16:59,484 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 397 transitions, 2548 flow [2023-08-30 06:16:59,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-30 06:16:59,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-30 06:16:59,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 3343 transitions. [2023-08-30 06:16:59,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4450212992545261 [2023-08-30 06:16:59,512 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 3343 transitions. [2023-08-30 06:16:59,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 3343 transitions. [2023-08-30 06:16:59,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:16:59,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 3343 transitions. [2023-08-30 06:16:59,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 139.29166666666666) internal successors, (3343), 24 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:59,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 313.0) internal successors, (7825), 25 states have internal predecessors, (7825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:59,535 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 313.0) internal successors, (7825), 25 states have internal predecessors, (7825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:59,535 INFO L175 Difference]: Start difference. First operand has 63 places, 38 transitions, 228 flow. Second operand 24 states and 3343 transitions. [2023-08-30 06:16:59,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 397 transitions, 2548 flow [2023-08-30 06:16:59,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 397 transitions, 2523 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 06:16:59,546 INFO L231 Difference]: Finished difference. Result has 97 places, 51 transitions, 407 flow [2023-08-30 06:16:59,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=407, PETRI_PLACES=97, PETRI_TRANSITIONS=51} [2023-08-30 06:16:59,547 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 58 predicate places. [2023-08-30 06:16:59,547 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 51 transitions, 407 flow [2023-08-30 06:16:59,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 126.0) internal successors, (3024), 24 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:59,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:16:59,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:16:59,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-08-30 06:16:59,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:16:59,752 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 06:16:59,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:16:59,753 INFO L85 PathProgramCache]: Analyzing trace with hash -705117191, now seen corresponding path program 1 times [2023-08-30 06:16:59,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:16:59,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1127605778] [2023-08-30 06:16:59,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:16:59,753 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:16:59,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:16:59,754 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:16:59,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-08-30 06:16:59,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:16:59,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 06:16:59,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:16:59,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:16:59,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 06:16:59,836 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:16:59,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1127605778] [2023-08-30 06:16:59,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1127605778] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 06:16:59,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 06:16:59,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 06:16:59,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750945332] [2023-08-30 06:16:59,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 06:16:59,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 06:16:59,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:16:59,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 06:16:59,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 06:16:59,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 313 [2023-08-30 06:16:59,843 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 51 transitions, 407 flow. Second operand has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:16:59,843 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:16:59,843 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 313 [2023-08-30 06:16:59,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:17:00,229 INFO L130 PetriNetUnfolder]: 1544/2912 cut-off events. [2023-08-30 06:17:00,230 INFO L131 PetriNetUnfolder]: For 3634/3809 co-relation queries the response was YES. [2023-08-30 06:17:00,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8568 conditions, 2912 events. 1544/2912 cut-off events. For 3634/3809 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 17243 event pairs, 576 based on Foata normal form. 175/2875 useless extension candidates. Maximal degree in co-relation 8525. Up to 1901 conditions per place. [2023-08-30 06:17:00,240 INFO L137 encePairwiseOnDemand]: 310/313 looper letters, 48 selfloop transitions, 2 changer transitions 8/60 dead transitions. [2023-08-30 06:17:00,240 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 60 transitions, 553 flow [2023-08-30 06:17:00,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 06:17:00,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 06:17:00,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 426 transitions. [2023-08-30 06:17:00,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4536741214057508 [2023-08-30 06:17:00,242 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 426 transitions. [2023-08-30 06:17:00,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 426 transitions. [2023-08-30 06:17:00,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:17:00,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 426 transitions. [2023-08-30 06:17:00,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:00,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:00,245 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:00,245 INFO L175 Difference]: Start difference. First operand has 97 places, 51 transitions, 407 flow. Second operand 3 states and 426 transitions. [2023-08-30 06:17:00,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 60 transitions, 553 flow [2023-08-30 06:17:00,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 60 transitions, 505 flow, removed 13 selfloop flow, removed 10 redundant places. [2023-08-30 06:17:00,251 INFO L231 Difference]: Finished difference. Result has 90 places, 48 transitions, 345 flow [2023-08-30 06:17:00,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=345, PETRI_PLACES=90, PETRI_TRANSITIONS=48} [2023-08-30 06:17:00,251 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 51 predicate places. [2023-08-30 06:17:00,252 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 48 transitions, 345 flow [2023-08-30 06:17:00,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:00,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:17:00,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:17:00,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2023-08-30 06:17:00,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:17:00,459 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 06:17:00,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:17:00,460 INFO L85 PathProgramCache]: Analyzing trace with hash 58817730, now seen corresponding path program 1 times [2023-08-30 06:17:00,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:17:00,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2131948924] [2023-08-30 06:17:00,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 06:17:00,460 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:17:00,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:17:00,476 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:17:00,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-08-30 06:17:00,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 06:17:00,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 06:17:00,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:17:00,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-08-30 06:17:00,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-30 06:17:00,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:17:00,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:17:00,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 178 [2023-08-30 06:17:01,154 INFO L321 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2023-08-30 06:17:01,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 274 treesize of output 182 [2023-08-30 06:17:01,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 104 [2023-08-30 06:17:04,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 06:17:04,137 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:17:04,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2131948924] [2023-08-30 06:17:04,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2131948924] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:17:04,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:17:04,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2023-08-30 06:17:04,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687382345] [2023-08-30 06:17:04,137 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:17:04,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:17:04,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:17:04,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:17:04,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:17:05,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 313 [2023-08-30 06:17:05,258 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 48 transitions, 345 flow. Second operand has 12 states, 12 states have (on average 119.83333333333333) internal successors, (1438), 12 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:05,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:17:05,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 313 [2023-08-30 06:17:05,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:17:06,299 INFO L130 PetriNetUnfolder]: 1443/2727 cut-off events. [2023-08-30 06:17:06,299 INFO L131 PetriNetUnfolder]: For 2389/2389 co-relation queries the response was YES. [2023-08-30 06:17:06,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8175 conditions, 2727 events. 1443/2727 cut-off events. For 2389/2389 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 14586 event pairs, 80 based on Foata normal form. 20/2747 useless extension candidates. Maximal degree in co-relation 8130. Up to 881 conditions per place. [2023-08-30 06:17:06,308 INFO L137 encePairwiseOnDemand]: 307/313 looper letters, 55 selfloop transitions, 6 changer transitions 9/71 dead transitions. [2023-08-30 06:17:06,308 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 71 transitions, 565 flow [2023-08-30 06:17:06,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 06:17:06,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 06:17:06,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 863 transitions. [2023-08-30 06:17:06,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3938840712003651 [2023-08-30 06:17:06,312 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 863 transitions. [2023-08-30 06:17:06,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 863 transitions. [2023-08-30 06:17:06,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:17:06,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 863 transitions. [2023-08-30 06:17:06,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 123.28571428571429) internal successors, (863), 7 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:06,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 313.0) internal successors, (2504), 8 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:06,315 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 313.0) internal successors, (2504), 8 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:06,315 INFO L175 Difference]: Start difference. First operand has 90 places, 48 transitions, 345 flow. Second operand 7 states and 863 transitions. [2023-08-30 06:17:06,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 71 transitions, 565 flow [2023-08-30 06:17:06,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 71 transitions, 542 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-08-30 06:17:06,320 INFO L231 Difference]: Finished difference. Result has 90 places, 50 transitions, 362 flow [2023-08-30 06:17:06,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=362, PETRI_PLACES=90, PETRI_TRANSITIONS=50} [2023-08-30 06:17:06,321 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 51 predicate places. [2023-08-30 06:17:06,321 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 50 transitions, 362 flow [2023-08-30 06:17:06,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 119.83333333333333) internal successors, (1438), 12 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:06,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:17:06,322 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:17:06,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-08-30 06:17:06,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:17:06,529 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 06:17:06,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:17:06,530 INFO L85 PathProgramCache]: Analyzing trace with hash 915687345, now seen corresponding path program 2 times [2023-08-30 06:17:06,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:17:06,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1482085495] [2023-08-30 06:17:06,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 06:17:06,530 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:17:06,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:17:06,531 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:17:06,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-08-30 06:17:06,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 06:17:06,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:17:06,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-30 06:17:06,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:17:06,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 9 [2023-08-30 06:17:06,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-08-30 06:17:06,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:17:06,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:17:07,037 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 06:17:07,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 344 treesize of output 204 [2023-08-30 06:17:07,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 200 [2023-08-30 06:17:07,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 200 treesize of output 196 [2023-08-30 06:17:07,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 06:17:07,426 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-08-30 06:17:07,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1482085495] [2023-08-30 06:17:07,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1482085495] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 06:17:07,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-08-30 06:17:07,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2023-08-30 06:17:07,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367273147] [2023-08-30 06:17:07,426 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-08-30 06:17:07,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-30 06:17:07,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-08-30 06:17:07,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-30 06:17:07,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-08-30 06:17:08,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 313 [2023-08-30 06:17:08,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 50 transitions, 362 flow. Second operand has 12 states, 12 states have (on average 117.75) internal successors, (1413), 12 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:08,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 06:17:08,201 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 313 [2023-08-30 06:17:08,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 06:17:09,146 INFO L130 PetriNetUnfolder]: 2151/3954 cut-off events. [2023-08-30 06:17:09,146 INFO L131 PetriNetUnfolder]: For 3104/3104 co-relation queries the response was YES. [2023-08-30 06:17:09,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11822 conditions, 3954 events. 2151/3954 cut-off events. For 3104/3104 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 22266 event pairs, 272 based on Foata normal form. 98/4052 useless extension candidates. Maximal degree in co-relation 11778. Up to 1475 conditions per place. [2023-08-30 06:17:09,157 INFO L137 encePairwiseOnDemand]: 305/313 looper letters, 51 selfloop transitions, 6 changer transitions 39/96 dead transitions. [2023-08-30 06:17:09,157 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 96 transitions, 706 flow [2023-08-30 06:17:09,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 06:17:09,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 06:17:09,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1569 transitions. [2023-08-30 06:17:09,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38559842713197345 [2023-08-30 06:17:09,161 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1569 transitions. [2023-08-30 06:17:09,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1569 transitions. [2023-08-30 06:17:09,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 06:17:09,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1569 transitions. [2023-08-30 06:17:09,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 120.6923076923077) internal successors, (1569), 13 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:09,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 313.0) internal successors, (4382), 14 states have internal predecessors, (4382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:09,167 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 313.0) internal successors, (4382), 14 states have internal predecessors, (4382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:09,167 INFO L175 Difference]: Start difference. First operand has 90 places, 50 transitions, 362 flow. Second operand 13 states and 1569 transitions. [2023-08-30 06:17:09,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 96 transitions, 706 flow [2023-08-30 06:17:09,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 96 transitions, 692 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-30 06:17:09,175 INFO L231 Difference]: Finished difference. Result has 105 places, 50 transitions, 389 flow [2023-08-30 06:17:09,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=389, PETRI_PLACES=105, PETRI_TRANSITIONS=50} [2023-08-30 06:17:09,176 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 66 predicate places. [2023-08-30 06:17:09,176 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 50 transitions, 389 flow [2023-08-30 06:17:09,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 117.75) internal successors, (1413), 12 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 06:17:09,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 06:17:09,177 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 06:17:09,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-08-30 06:17:09,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:17:09,401 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-08-30 06:17:09,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 06:17:09,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1263349585, now seen corresponding path program 3 times [2023-08-30 06:17:09,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-08-30 06:17:09,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [709933872] [2023-08-30 06:17:09,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 06:17:09,402 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-08-30 06:17:09,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-08-30 06:17:09,405 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-08-30 06:17:09,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-08-30 06:17:09,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 06:17:09,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 06:17:09,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 06:17:09,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 06:17:09,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-08-30 06:17:10,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2023-08-30 06:17:10,609 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 06:17:10,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 06:17:20,019 INFO L321 Elim1Store]: treesize reduction 888, result has 19.1 percent of original size [2023-08-30 06:17:20,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 708 treesize of output 564 [2023-08-30 06:17:20,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 317 treesize of output 309 [2023-08-30 06:17:20,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 309 treesize of output 301 [2023-08-30 06:21:03,958 WARN L222 SmtUtils]: Spent 14.61s on a formula simplification. DAG size of input: 2457 DAG size of output: 2610 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-30 06:24:13,339 WARN L222 SmtUtils]: Spent 54.05s on a formula simplification. DAG size of input: 4229 DAG size of output: 4250 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-30 06:24:25,299 WARN L222 SmtUtils]: Spent 8.39s on a formula simplification. DAG size of input: 4182 DAG size of output: 4170 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-30 06:29:35,622 WARN L222 SmtUtils]: Spent 1.04m on a formula simplification. DAG size of input: 7569 DAG size of output: 7574 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-30 06:29:52,504 WARN L222 SmtUtils]: Spent 8.26s on a formula simplification that was a NOOP. DAG size: 7555 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15